In momenta space, the solution of this equation is given by [1]}, [2]}
\(\Delta _0(p)=M{\hat{Z}}(\mu ,m,Ng^2)\frac{2\pi ^3}{K^3(\kappa )}\times \nonumber \\\sum _{n=0}^\infty (-1)^n\frac{e^{-(n+\frac{1}{2})\pi \frac{K^{\prime }(\kappa )}{K(\kappa )}}}{1-e^{-(2n+1)\frac{K^{\prime }(\kappa )}{K(\kappa )}\pi }}\times \nonumber \\(2n+1)^2\frac{1}{p^2-m_n^2+i\epsilon }\) 
